mirror of https://github.com/gnss-sdr/gnss-sdr
210 lines
6.2 KiB
C++
210 lines
6.2 KiB
C++
/*!
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* \file glonass_l1_ca_dll_pll_c_aid_tracking_sc.h
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* \brief Implementation of a code DLL + carrier PLL tracking block
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* \author Gabriel Araujo, 2017. gabriel.araujo.5000(at)gmail.com
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* \author Luis Esteve, 2017. luis(at)epsilon-formacion.com
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* \author Damian Miralles, 2017. dmiralles2009(at)gmail.com
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*
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*
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* Code DLL + carrier PLL according to the algorithms described in:
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* K.Borre, D.M.Akos, N.Bertelsen, P.Rinder, and S.H.Jensen,
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* A Software-Defined GPS and Galileo Receiver. A Single-Frequency
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* Approach, Birkha user, 2007
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*
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* -----------------------------------------------------------------------------
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*
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* Copyright (C) 2010-2020 (see AUTHORS file for a list of contributors)
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*
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* GNSS-SDR is a software defined Global Navigation
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* Satellite Systems receiver
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*
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* This file is part of GNSS-SDR.
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*
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* SPDX-License-Identifier: GPL-3.0-or-later
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*
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* -----------------------------------------------------------------------------
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*/
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#ifndef GNSS_SDR_GLONASS_L1_CA_DLL_PLL_C_AID_TRACKING_SC_H
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#define GNSS_SDR_GLONASS_L1_CA_DLL_PLL_C_AID_TRACKING_SC_H
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#include "cpu_multicorrelator_16sc.h"
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#include "glonass_l1_signal_processing.h"
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#include "gnss_block_interface.h"
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#include "gnss_synchro.h"
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#include "tracking_2nd_DLL_filter.h"
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#include "tracking_FLL_PLL_filter.h"
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#include <gnuradio/block.h>
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#include <volk_gnsssdr/volk_gnsssdr.h>
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#include <volk_gnsssdr/volk_gnsssdr_alloc.h> // for volk_gnsssdr::vector
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#include <deque>
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#include <fstream>
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#include <map>
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#include <string>
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/** \addtogroup Tracking
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* \{ */
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/** \addtogroup Tracking_gnuradio_blocks
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* \{ */
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class glonass_l1_ca_dll_pll_c_aid_tracking_sc;
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using glonass_l1_ca_dll_pll_c_aid_tracking_sc_sptr = gnss_shared_ptr<glonass_l1_ca_dll_pll_c_aid_tracking_sc>;
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glonass_l1_ca_dll_pll_c_aid_tracking_sc_sptr
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glonass_l1_ca_dll_pll_c_aid_make_tracking_sc(
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int64_t fs_in, uint32_t vector_length,
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bool dump,
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const std::string& dump_filename,
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float pll_bw_hz,
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float dll_bw_hz,
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float pll_bw_narrow_hz,
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float dll_bw_narrow_hz,
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int32_t extend_correlation_ms,
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float early_late_space_chips);
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/*!
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* \brief This class implements a DLL + PLL tracking loop block
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*/
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class glonass_l1_ca_dll_pll_c_aid_tracking_sc : public gr::block
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{
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public:
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~glonass_l1_ca_dll_pll_c_aid_tracking_sc();
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void set_channel(uint32_t channel);
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void set_gnss_synchro(Gnss_Synchro* p_gnss_synchro);
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void start_tracking();
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int general_work(int noutput_items, gr_vector_int& ninput_items,
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gr_vector_const_void_star& input_items, gr_vector_void_star& output_items);
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void forecast(int noutput_items, gr_vector_int& ninput_items_required);
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private:
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friend glonass_l1_ca_dll_pll_c_aid_tracking_sc_sptr
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glonass_l1_ca_dll_pll_c_aid_make_tracking_sc(
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int64_t fs_in, uint32_t vector_length,
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bool dump,
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const std::string& dump_filename,
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float pll_bw_hz,
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float dll_bw_hz,
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float pll_bw_narrow_hz,
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float dll_bw_narrow_hz,
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int32_t extend_correlation_ms,
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float early_late_space_chips);
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glonass_l1_ca_dll_pll_c_aid_tracking_sc(
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int64_t fs_in, uint32_t vector_length,
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bool dump,
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const std::string& dump_filename,
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float pll_bw_hz,
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float dll_bw_hz,
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float pll_bw_narrow_hz,
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float dll_bw_narrow_hz,
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int32_t extend_correlation_ms,
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float early_late_space_chips);
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void msg_handler_preamble_index(const pmt::pmt_t& msg);
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void check_carrier_phase_coherent_initialization();
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int32_t save_matfile() const;
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volk_gnsssdr::vector<gr_complex> d_ca_code;
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volk_gnsssdr::vector<lv_16sc_t> d_ca_code_16sc;
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volk_gnsssdr::vector<float> d_local_code_shift_chips;
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volk_gnsssdr::vector<lv_16sc_t> d_correlator_outs_16sc;
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volk_gnsssdr::vector<gr_complex> d_Prompt_buffer;
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Cpu_Multicorrelator_16sc multicorrelator_cpu_16sc;
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// PLL and DLL filter library
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Tracking_2nd_DLL_filter d_code_loop_filter;
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Tracking_FLL_PLL_filter d_carrier_loop_filter;
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// symbol history to detect bit transition
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std::deque<lv_16sc_t> d_E_history;
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std::deque<lv_16sc_t> d_P_history;
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std::deque<lv_16sc_t> d_L_history;
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Gnss_Synchro* d_acquisition_gnss_synchro;
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// file dump
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std::string d_dump_filename;
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std::ofstream d_dump_file;
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std::map<std::string, std::string> systemName;
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std::string sys;
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// tracking configuration vars
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int64_t d_fs_in;
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int64_t d_glonass_freq_ch;
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double d_early_late_spc_chips;
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uint32_t d_vector_length;
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uint32_t d_channel;
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int32_t d_n_correlator_taps;
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// remaining code phase and carrier phase between tracking loops
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double d_rem_code_phase_samples;
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double d_rem_code_phase_chips;
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double d_rem_carrier_phase_rad;
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int32_t d_rem_code_phase_integer_samples;
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// acquisition
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double d_acq_code_phase_samples;
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double d_acq_carrier_doppler_hz;
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// tracking vars
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float d_dll_bw_hz;
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float d_pll_bw_hz;
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float d_dll_bw_narrow_hz;
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float d_pll_bw_narrow_hz;
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double d_code_freq_chips;
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double d_code_phase_step_chips;
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double d_carrier_doppler_hz;
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double d_carrier_frequency_hz;
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double d_carrier_doppler_old_hz;
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double d_carrier_phase_step_rad;
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double d_acc_carrier_phase_cycles;
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double d_code_phase_samples;
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double d_pll_to_dll_assist_secs_Ti;
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double d_carr_phase_error_secs_Ti;
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double d_code_error_chips_Ti;
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double d_preamble_timestamp_s;
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int32_t d_extend_correlation_ms;
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double d_code_error_filt_chips_s;
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double d_code_error_filt_chips_Ti;
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// Integration period in samples
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int32_t d_correlation_length_samples;
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// processing samples counters
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uint64_t d_sample_counter;
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uint64_t d_acq_sample_stamp;
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// CN0 estimation and lock detector
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int32_t d_cn0_estimation_counter;
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double d_carrier_lock_test;
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double d_CN0_SNV_dB_Hz;
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double d_carrier_lock_threshold;
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int32_t d_carrier_lock_fail_counter;
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bool d_enable_extended_integration;
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bool d_preamble_synchronized;
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// control vars
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bool d_enable_tracking;
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bool d_pull_in;
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bool d_acc_carrier_phase_initialized;
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bool d_dump;
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};
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/** \} */
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/** \} */
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#endif // GNSS_SDR_GLONASS_L1_CA_DLL_PLL_C_AID_TRACKING_SC_H
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